Not all ports are open in debug mode?

I am trying to troubleshoot a sync related issue (which is still in
progress) so I do the sane thing and launch slapd by hand with -d 16384,
but when I do this it doesn't seem to open the 636 port....
It seems like it should as I am running:
/usr/sbin/slapd -h ldap:/// ldaps:/// ldapi:/// -g openldap -u openldap
-f /etc/ldap/slapd.conf -d 16384
When I do not launch it with debugging on 636 is opened.... What obvious
thing am I missing?
OpenLDAP 2.4.11
Pat